SAT (3 letters) The crossword solutions for the term 'Chaired, Say' are LED and SAT. LED stands for Light Emitting Diode, which is a semiconductor device that emits light when an electric current passes through it. SAT stands for Scholastic Aptitude Test, which is a standardized test used by colleges and universities in the United States to assess the academic readiness of applicants. Both LED and SAT are commonly used terms in the English language.